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USGS: 6.0 earthquake shakes Northern California

Officials say an earthquake with a preliminary magnitude of 6.0 has been reported in California's northern San Francisco Bay area.

The U.S. Geological Survey says it struck at just before 3:30 a.m. Sunday about 10 miles northwest of American Canyon, which is about 6 miles southwest of Napa. The USGS says it's the largest earthquake to shake the Bay Area since the 1989 6.9 magnitude Loma Prieta quake.

Oakland resident Rich Lieberman described the earthquake as a "rolling quake". He said, "It felt like a side-to-side kind of rolling sensation. Nothing violent but extremely lengthy and extremely active."

The shaking set off car alarms and had residents of neighboring Sonoma County running out of their houses in the middle of night. Officials say widespread power outages have been report in Sonoma County.

The USGS says the depth of the earthquake was just less than seven miles, and numerous small aftershocks have occurred in the Napa wine country.

A member of Napa County dispatch tells The Associated Press that there has been one report of structural damage, but additional details were not available.

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